微波消解-火焰原子吸收法测定平湖糟蛋中锌含量

Determination of zinc content in Pinghu egg preserved in rice wine by microwave digestion-flame atomic absorption spectrometry

中文关键词:  锌  平湖糟蛋  微波消解  火焰原子吸收法

英文关键词:zinc  Pinghu egg preserved in rice wine  microwave digestion  flame atomic absorption spectrometry

中文摘要:

      目的 建立利用微波消解样品, 火焰原子吸收法测定平湖糟蛋中锌含量的检测方法。方法 加入8 mL HNO3 2 mL H2O2组成的消化液, 采用多阶段程序升温, 最后微波消解-火焰原子吸收法测定。结果 测得平湖糟蛋中锌含量范围18.10~24.76 mg/kg, 锌的回收率96.45%?103.27%, 相对标准偏差(relative standard deviation, RSD)为2.07%。结论 本方法操作简便、污染少、回收率高, 测定结果准确可靠。

英文摘要:

      Objective To establish a method to determine zinc content in Pinghu egg preserved in rice wine by microwave digestion-flame atomic absorption spectrometry. Methods Samples was added by digested solution including 8 mL HNO3 and 2 mL H2O2, and determined by microwave digestion-flame atomic absorption spectrometry after multi-step warming program. Results Zinc content in Pinghu egg preserved in rice wine ranged from 18.10 mg/kg to 24.76 mg/kg, zinc recovery rate was 96.45%?103.27%, and the relative standard deviation (RSD) was 2.07%. Conclusion The developed method is easy to operate, environment-friendly with high recovery rate. The result is accurate and reliable.